(SPOJ) 842 - Torres de Hanói - Solução

import java.io.*;
import java.util.*;

class Main {
    public static void main(String[] args) throws NumberFormatException, IOException {
        Main processando = new Main();
        processando.processa();
       
        System.exit(0);
    }
   
    void processa() throws NumberFormatException, IOException {
        String line = "";
       
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int contador = 0;
        while ((line = br.readLine()) != null) {
            StringTokenizer tokenizer = new StringTokenizer(line);
            int valor = Integer.valueOf(tokenizer.nextToken());
           
            if (valor == 0) {
                return;
            }           
           
            contador++;
            System.out.println("Teste " + contador + "\n" + (int)(Math.pow(2,valor)-1) + "\n");
        }
                                   
        return;
    }
}